Marine propeller with detachable blades
AssigneeROLLS-ROYCE plc
InventorIstvan Bacskay
Life of this patent
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Abstract
A marine propeller comprises a hollow hub body (11), a plurality of propeller blades (16) and a plurality of fastening devices (19, 21) for each propeller blade (16). Each fastening device includes a tension rod (19) and a flange member (22) mounted on the tension rod. The propeller blades (16) may be turnable for adjustment of the blade pitch angle (α) and lockable in a selected position by means of the fastening devices (19, 21). The flange member (22) has a plurality of recesses (23) and tensioning members (24) received in the recesses. These tensioning members (24) are extendable from the flange member (22) towards the hub body wall (14) to apply tension to the tension rod (19).
Claims9
A marine propeller comprising
- a hollow hub body (11),
- a plurality of propeller blades (16) distributed about the hub body (11) and detachably secured to it in engagement with an external bearing surface (14C) on a wall of the hub body,
- a plurality of fastening devices (19,21) for each propeller blade (16), each fastening device including a tension rod (19) which extends from the cavity (11A) of the hub body (11) through openings (20) in the wall of the hub body and is anchored in the hub body, and a flange member (22) mounted on the tension rod and supported against the side of the hub body wall (14) facing the cavity (11A) of the hub body,
- characterised in that the flange member (22) of each fastening device (19,22) has a plurality of recesses (23) distributed about the tension rod (19) and tensioning members (24) received in the recesses, the tensioning members (24) being extendable from the flange member (22) towards the hub body wall (14) to apply tension to the tension rod (19).
A marine propeller comprising
- a hollow hub body (11),
- a plurality of propeller blades (16) distributed about the hub body (11) and detachably secured to it in engagement with an external bearing surface (14C) on a wall of the hub body,
- a plurality of fastening devices (19,21) for each propeller blade (16), each fastening device including a tension rod (19) which extends from the cavity (11A) of the hub body (11) through openings (20) in the wall of the hub body and is anchored in the hub body, and a flange member (22) mounted on the tension rod and supported against the side of the hub body wall (14) facing the cavity (11A) of the hub body),
- said openings (20) in the wall (14) of the hub body (11) being elongate and the propeller blades (16) being turnable on the bearing surface (14C) for adjustment of the blade pitch angle (α) in an angular range determined by the elongate openings (20) and lockable in a selected position of adjustment within said range by means of the fastening devices (19, 21).
- characterised in that the flange member (22) of each fastening device (19,22) has a plurality of recesses (23) distributed about the tension rod (19) and tensioning members (24) received in the recesses, the tensioning members (24) being extendable from the flange member (22) towards the hub body wall (14) to apply tension to the tension rod (19).
Dependencies are inferred from the claim text.